Effect of modifiers for As, Cu and Pb determinations in sugar-cane spirits by GF AAS

Caldas, Naíse Mary; Raposo, Jorge Luiz; Neto, José Anchieta Gomes; Barbosa, Fernando

doi:10.1016/j.foodchem.2008.08.028

Cited by 31 publications

(50 citation statements)

References 12 publications

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“…The fact that EC has been found in large concentrations in column still cachaça, 5 (which would in principle bear a resemblance to the process of a sugarcane-derived vodka), may be explained by its distillation in a single distillation column, with a limited number of trays (15)(16)(17)(18)(19)(20), to ensure the desirable cachaça flavor is retained. 25 In fact, during the profiling of three major column still cachaça distilleries in Pernambuco State, Northeast Brazil, it was observed that cachaça passed through a single distillation column containing an average of 19 trays; the final spirit was collected at 47% vol.…”

Section: Resultsmentioning

confidence: 99%

“…Hollow cathode lamps (Photron, Australia) were used for the determination of Cu (249.2 nm) and Pb (283.3 nm) operated at 10 and 20 mA, respectively. 18 High-purity argon was used as the purge gas throughout at a flow rate of 200 mL/min. Other operating conditions were established according to recommendations of the manufacturer.…”

Section: Methodsmentioning

confidence: 99%

“…and checked by standard addition. Table 1 shows results for alcoholic strength, pH, volatile acidity, ethyl acetate, higher alcohols, total congeners and ethyl carbamate of 32 samples of Brazilian vodkas (ranked in increasing order of retail price, US$2.86-US$12.73) from a wide range of brands (20) and producers (18). Concentration ranges, median, mean and P95 (95 th percentile) of values, as well as limits established by Brazilian and European Union (EU) regulations for vodkas, are also presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

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Brazilian vodkas have undetectable levels of ethyl carbamate

S.¹,

A.²,

Nóbrega³

et al. 2013

Quím. Nova

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Recebido em 25/9/12; aceito em 21/1/13; publicado na web em 14/5/13While in Europe vodka is mainly derived from potatoes or cereals, a large proportion of Brazilian vodka is likely obtained from sugarcane, which contains ethyl carbamate (EC) precursors. EC, in addition to several other contaminants and congeners, were investigated in 32 samples of Brazilian vodka. All samples complied with the Brazilian regulations for congeners and contaminants, having EC content below 0.01 mg/L (detection limit). These results are probably related to the processing of vodka, in particular the use of extractive and rectifying stainless steel distillation columns, which allow the production of high strength spirits with low levels of congeners and contaminants.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Brazilian vodkas have undetectable levels of ethyl carbamate

S.¹,

A.²,

Nóbrega³

et al. 2013

Quím. Nova

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“…For this purpose, spectroscopic, chromatographic, voltammetric, and hyphenated methods are being used. Among these, atomic absorption spectrometry [2], graphite furnace atomic absorption spectrophotometry [3,4], hydride generation atomic absorption spectrometry [5][6][7][8][9], high-performance liquid chromatography [10,11], and high-performance liquid chromatography − inductively coupled plasma mass spectrometry [12][13][14] can be mentioned. When arsine generation and gas-phase molecular absorption spectrometry was used, the limit of detection for As(III) and As(V) was found to be 0.5 and 3 µg mL -1 respectively [15].…”

Section: Introductionmentioning

confidence: 99%

A Study for the Evaluation of Quantitative Reaction Conditions Between As(V) and Ti(III) for the DP Polarographic Determination of Electroinactive As(V) and Application

Somer¹,

Şendil²,

Ekmekci³

et al. 2017

Eurasian J Anal Chem

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In this investigation a differential pulse polarographic method (DPP) is established to determine the electroinactive arsenic (V), which is formed after the wet digestion of the natural samples. For this purpose, As(V) formed is reduced into As(III) using Ti(III). According to the literature survey this redox reaction between As(V) and Ti(III) has been used first time in this work. In order to have the reaction quantitative the optimum reaction conditions such as Ti(III)/ As(V) concentration ratio, reaction pH, waiting time for reaction and temperature had to be investigated. It was found that Ti(III)/ As(V) concentration ratio had to be larger than 3-5 times, HCl concentration 0.4 to 1.0 M, reaction temperature 60 -90 º C and waiting interval 3-5 minutes. Under the experimentally decided conditions the reduction was very fast and quantitative. No interference was observed from most common ions. The LOD was found as 1.5×10 -7 M. The newly developed method is applied for the determination of arsenic in beer. The reduction procedure takes place directly in polarographic cell. This newly developed method can safely be used for the speciation of As(III) and As(V) and for total arsenic quantity determination in natural samples.

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“…[4][5][6][7][8] Excess lead intake also produces harmful effects on the human health since several organ systems are affected and nervous, gastrointestinal, reproductive, skeletal and biochemical activities are impaired. 9,10 Analysis of copper and lead in the sugar cane spirit is routinely carried out using flame atomic absorption spectrometry (F AAS), [11][12][13][14][15][16] inductively coupled plasma mass spectrometry (ICP-MS) 17 and UV-Vis spectrophotometry. 18,19 The electroanalytical techniques can be used as an alternative method in analytical chemistry and offer the additional benefit of being compatible with the principles of green chemistry.…”

Section: Introductionmentioning

confidence: 99%

An alternative method for the simultaneous determination of copper and lead for quality control of sugar cane spirit using a nanotube-based sensor

Tavares¹,

Okumura²,

Cardoso³

et al. 2012

J. Braz. Chem. Soc.

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Um método eletroanalítico foi desenvolvido para determinação simultânea de íons cobre e chumbo em cachaça empregando eletrodo de pasta de carbono modificado com ácido ascórbico e nanotubos de carbono (CPE-AaCNT). A técnica de voltametria de onda quadrada (SWV) com redissolução anódica foi empregada e otimizada com relação aos seguintes parâmetros: frequência (50 Hz), amplitude (100 mV) e incremento de varredura (9 mV). As curvas analíticas apresentaram intervalo linear de 0,09 a 7,00 mg L -1 para o chumbo e para o cobre. Os limites de detecção foram de 48,5 e 23,9 µg L -1 para o chumbo e o cobre, respectivamente. O método desenvolvido foi aplicado na determinação simultânea de chumbo e cobre em cinco amostras comerciais de cachaça. Os resultados apresentaram-se concordantes com os obtidos por F AAS/GF AAS (espectrometria de absorção atômica com chama/espectrometria de absorção atômica com forno de grafite) e revelaram que CPE-AaCNT podem ser empregados com êxito na quantificação de cobre e chumbo em amostras comerciais de cachaça.The development of an electroanalytical method for simultaneous determination of copper and lead ions in sugar cane spirit (cachaça) using carbon paste electrode modified with ascorbic acid and carbon nanotubes (CPE-AaCNT) is described. Squarewave voltammetry (SWV) with anodic stripping was employed, and this technique was optimized with respect to the following parameters: frequency (50 Hz), amplitude (100 mV) and scan increment (9 mV). The analytical curves were linear in the range from 0.0900 to 7.00 mg L -1 for lead and copper. The limits of detection were 48.5 and 23.9 µg L -1 for lead and copper, respectively. The developed method was applied to the simultaneous determination of copper and lead in five commercial samples of sugar cane spirit. The results were in good agreement with those obtained by F AAS/GF AAS (flame atomic absorption spectrometry/graphite furnace atomic absorption spectrometry) and showed that CPE-AaCNT can be successfully employed in the simultaneous determination of these metals in real sugar cane spirit samples.

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Effect of modifiers for As, Cu and Pb determinations in sugar-cane spirits by GF AAS

Cited by 31 publications

References 12 publications

Brazilian vodkas have undetectable levels of ethyl carbamate

Brazilian vodkas have undetectable levels of ethyl carbamate

A Study for the Evaluation of Quantitative Reaction Conditions Between As(V) and Ti(III) for the DP Polarographic Determination of Electroinactive As(V) and Application

An alternative method for the simultaneous determination of copper and lead for quality control of sugar cane spirit using a nanotube-based sensor

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